Steam-boiler



rounds the bank of tubes within the boiler4 UNITED STATES PATENT4 onirica.

y. lIl HOlVIAS T. PARKER, OF BROOKLYN, NEW YORK.

To all who/1L it may concern:

Be it known that I, TI- roMAs T. PARKER, a citizen of the United States, 'and resident of the city of New yYork, borough of Brooke lyn', in the county of Kings and 'Stat-e of New York, have invented certain new and useful Improvements in Steam-Boilers, of

which the following is a specification.

This invention relates to steam boilers and particularly to an'improvement in the boiler feedwater structure set out in my Letters Patent of the United States No. 994,655,

dated June G, 1911; which structure coml prises'a relatively large feed-water purifying chamber which preferably entirely surand has a special overflow connection with the boller proper at a point above the normal level of the water in the 'latter and somewhat below the surface of the feed-water within the chamber. The shell of this chamltra `ber adjacent the bank of tubes, being exposed to the heat of the boiler water, absorbs' some of such heat .and transmits it tothe feed water 'contained in the chamber, thus effecting the substantial liberation of the solids in suspension in the feed water. The capacity of the chamber is so relatively large that a given body of water passes through it slowly and thus permits the precipitation of the heavier solids of which .a large part sink 'to the bottom of the chamber. The lighter matters, such as oil and other substances which, have 'not suflicient specific gravity to sink, collect in the upper part of the chamber at or near the surface of the water; but by reason of thedescribed overflow,connecn tion the passageI of such lighter substances to the boller proper is eifectuallywprevented.

According to my present improvement I provide a simple and efficient construction whereby an additional heating -surface of extended area for the feed water is secured, which surface is subjected directly to the heating influence of the boiler water, thereby attaining a lmore rapid precipitation of the solids than formerly and thus insuring a more complete removal of the foreign'niat*b ter from the feed-water preparatory to the ingress of the water to the boiler proper. In the form of my invention hereinillustrated, this additional heating surface 1s constituted by the inner wall of an auxiliary chamber which preferably completely surrounds the feed water chamber, said Wall constituting the outer spaced shell of the STEAM-BOILER.

Specification of Letters Patentl Patented llIay 13, 191.94 Application led J une 21, 1918. Serial No. 2411,105'. l

latter chamber. The auxiliary chamber is in circulatory communication with -the water 1n the boiler proper, and hence such wall absorbs heat from the boiler water and' transmlts it to the feed water. The two spaced shells constituting the walls of the' feed water chamber are preferably so constructed and combined as to provide a unitary structure that ca'n be readily applied to or re# moved from the boiler proper. v

A construction, embodyingl the principle of my invention, will be hereinafter described in detail, and the precise scope of the 'invention will be defined in the appended claims.

In the drawings- Figure 1 is a longitudinal section of a vertical tubeboiler equipped with a feed-water structure embodying my improvement.

Figs. 2 and 3 are horizontal sections, as on the lines 2"? and 343, respectively, of Fig. 1.

Fig; L1 is a sectional elevation of a portion of the boiler adjacent one ofthe hand-holes,

. as on the line 4-4 of Fig. 1.

spaced relationtt'o each other, and are Vwelded or otherwise connected at their lower ends to an annulus 16 which constitutesthe' bottom of the chamber. The outer shell 14 depends somewhat below the bottom, as at 17, and the inner shell 15 is provided somewhat below its upper end with an elongated discharge opening 18, to which leads a vertical conduit constituted by a; dependirg hood 19 which is affixed tothe shell 15 directly above the opening. The outer shell is supported in spaced relation to the shell 10 of lthe boiler by means of distance blocks 20 which are secured by rivets 21., or in any other suitable manner, to the: boiler shell, so as to provide mentioned. This chamber comprises two cy# lindrical shells` 14, 15 which are'arranged in 4 proper, ivhereby free circulation ofthe hot boiler Water Within the chamber 22 is insured.' In the present instance there are tivo diametrical-ly-'opposite distance ,blocks y2() at L. each 'end ofl the shell, but, of course, lthe 'number of blocks,or their specic location in the length' of the struct-ure,'ma'v be altered, as desired.-

-The boiler-shell 10 is provided with 'hand' holes :23 Whichaline with holes 24 in the ad- -jacent shell 14, Aso as ,to facilitate vaccess to the interior of "the purifying chamber 13. Elliptic. distance-'or packing rings Qvare interposed-betiveenthe said shells 10 and 14, in.. proximity -to the hand'holes, so as to vseal ,the

chamber 22 around such openings.

Feed' Water is delivered tothe 'chamber 13 through a supply pipe 26,-ivhich enters the boiler shell 10 at or near. the bottom of-the chamber. This c-hamberlgis also provided, near its bottom, with a vsuitably-disposed 'bloivoff pipe 27 Which extends through vthe boiler shell. The `boiler shell `is provided with a Suitable Water gage, and pet cocks -'as usual, (not shown) the'same being'in communication with the chamber xthrough which the hot boiler vater is'A- circulating as abovementioned.

In the vconstruction described in Patent No. 994,655 above referred to, the sideofl the feedwater chamber adjacent thetubes was the'only surface available for transmitting the heat 'from the boiler water to the feed Water and thereby precipitating they solids "tion herein shoivnfand ldescribed the heating surface for the feed water is greatly extendin the liquid; but in the improved construced since they inner and outer Walls of the feed-Water chamber are exposed to the hot boiler Water Which circulates I'on both sides of said chamber. yTherefore the feed water Within the chamber 13 is naturally heated to a. higher Gegree than formerly, thusy securing greater precipitation of the solids and in suring more efficient purification of the feed Water preparatory to its 'delivery -to the boiler proper by Way 'of the discharge open-` in 18.

y the described arrangement of the spaced apart shells 14, 15 and the basal annulus 16 therefor, a unitary purifyin -strnc-l ture is provided, which can be rea ily installed in or removed from the boiler With comparatively little labor or expense. Further, as the feed-Waterv chamber constituted 'by said structure is separate from the boiler shell, corrosion of the latter by the chemical 'action thereon of' acids, alkalis,` or other for,

eign properties, .in'the feed Water, ise'ec- 'tuall prevented.

i I d70 notlimit my invention jto the details of construction herein shown and described, as the same may be modified without depart- -in'g vfrom the lprinciple of the invention as defined in the appended' claims.-

. 1. The combination with a vertical firetube boiler, of 'a unitary double-walled cylindrical feedivatei"struc`ture mounted there-l ii in concentric .relation to the boiler shell, said structure' comprisino a basal annulus` surrounding the tubes adjacent their-lower lends, and twospaced-apart lconcentric Walls rising from said annulus and extending above thenormal @level of the boiler Water,

the inner Wall having an overloiv above such level, and means 'whereby the outer wall of said structure is maintained-in spaced rela' tion to the boiler shell to provide a water 1 lower ends and two'spaced-apart concentric -walls iisin from said .annulus and. extendf' ing'abovet e normal level of thefboiler water,y the inner Wall having an overowabove such level and the outer wall having an inress opening'therein in line with said open- 'ing of the'boiler shell,spacing blocks arranged a't intervals between the 'outer Wall of said structure kand ,the boiler shell, and spacing and packing rings in proximity' to the alining openings in said outer wall and shell, said walls thus presenting wide circume ferential areas to thev influence of the hot4 boiler water. I

` Signed at the cityof New York and State` (of New York this'18thday of June Anl).

THOMAS fr. PARKER. 

